Graptolites of the Cyrtograptus lapworthi Zone on Bornholm (Silurian of Denmark)

Where: Bornholm, Denmark (55.1° N, 14.7° E: paleocoordinates 27.2° S, 4.2° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Telychian (438.5 - 433.4 Ma)

Environment/lithology: marine; lithified, gray shale and lithified, ooidal limestone

• "[In lower part] dark grey shale...In the middle part...grey-greenish mudstones predominant, and burrrows occur frequently. The mudstones are interbedded with a few layers of dark grey graptolitiferous shales...In the upper part...alternation of dark grey to greenish bands with a few 10 cm thick bands of recrystallized oolitic limestone.

Collection methods: Mentioned but not listed by genus are orthocone cephalopods, ceratiocarids, and pelecypods.

Primary reference: M. Bjerreskov. 1975. Llandoverian and Wenlockian graptolites from Bornholm. Fossils and Strata (8)1-93 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 13715: authorized by Michael Foote, entered by Michael Foote on 19.04.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

 Orthocerida -
Aptychopsis sp. Barrande 1872
 Graptoloidea - Cyrtograptidae
 Graptoloidea - Monograptidae
Monograptus priodon Bronn 1835 graptolite
"Monograptus spiralis" = Oktavites spiralis Geinitz 1842 graptolite
 Graptoloidea - Retiolitidae
Retiolites geinitzianus Barrande 1850 graptolite